U.S. seeks to pile up sanctions on N. Korea if it disagrees to deneutralize

President Donald Trump's national security adviser said on Tuesday that the United States will look at ramping up sanctions on North Korea if Pyongyang doesn't scrap its nuclear program.

"If they're not willing to do it, then I think President Trump has been very clear ... they're not going to get relief from the crushing economic sanctions that have been imposed on them and we'll look at ramping those sanctions up in fact," John Bolton told Fox Business Network in an interview.